Method of fabric finishing

ABSTRACT

A method of fabric finishing wherein color migration of colorants is effected on fabric by the use of faster drying surface zones in cooperating relationship with the fabric to provide novel and decorative effects on specific portions of the fabric.

United States Patent Remus F. Caroselli Cumberland;

Vineenzo Mastrianni, Cranston, both of R.I.; David W. Boyes, Bedford, Va.

Inventors [50] Fieldofsearch 118/101, 59, 60; 8/176, 14; 1 17/37, 38, 68, 62,126

[56] References Cited UNITED STATES PATENTS 2,199,233 4/1940 Williams 8/14 2,415,320 2/1947 Whittaker et a1. 8/14 3,507,604 4/1970 Bergman et a1 8/176 X Primary Examiner-Ralph S. Kendall AuorneysStaeIin & Overman and Daniel D. Mast ABSTRACT: A method of fabric finishing wherein color migration of colorants is effected on fabric by the use of faster drying surface zones in cooperating relationship with the fabric to provide novel and decorative effects on specific portions of the fabric.

METHOD OF FABRIC FINISHING BACKGROUND OF THE INVENTION This invention relates to the treatment of fibrous glass and particularly to the treatment of fibrous glass fabric to improve the aesthetic properties thereof, particularly its appearance.

In the past, fabric makers have sought to alter the inherent characteristics of glass fiber fabrics to look and feel more like fabrics produced from cotton, wool, organics, and combinations thereof. Fabrics composed of glass fibers, when untreated, are shiny and slippery to the touch.

Methods in the art to change some of the characteristics of fibrous glass fabrics include texturizing continuous yarns to impart bulkiness therein, roughening the fiber surface to eliminate the shiny and slippery effect, and various other surface treatments. Dyeing the fabrics and printing thereon by means of silk screening have also been used prior to now to give the desired decorative effects. However, with the latter two techniques there are many problems that face the fabricators of fibrous glass fabrics that fabricators of other yarns do not have to meet. Among these problems are color tone, depth, colorfastness, hand, crocking, washability, crazing, etc.

Fibrous glass is not capable of absorbing a liquid media as is cotton or wool, but rather has to rely on adsorption of finishes through the action of surface chemistry.

U.S. Pat. No. 3,070,981 shows how fibers are attenuated from a molten glass mass and are sized with a protective coating so that they are able to withstand post forming operations. The sizing adheres to the glass fiber surface and most important therein are the functional groups provided by the sizing for compatibility with other media such as dyestuffs or pigmented dispersions. When the intended use of a fabric does not require heat cleaning, a resin-bonded pigmented finish may be directly applied to the sizing on the fibers making up the fabric. When heat cleaning of the fabric is required because of the intended end use thereof, methods such as described in US. Pat. No. 3,065,103 are used and a finish composition containing aqueous colorants are padded on the fabric.

Obtaining various patterns and colors on the glass fiber product heretofore has been accomplished via silk screening, kiss printing and other conventional methods. Such methods used heretofore on glass fabrics have not been without inconvenience and other problems. Among the problems that arise with the silk screening and kiss printing methods are the additional time required to set up the apparatus and prepare the fabric for entry into the apparatus and the provision of separate drying ovens for the treated fabric.

Instead of having a separate process after the fabric is treated with a finishing composition and having to provide separate apparatus and drying ovens therefore, the inventive concept, of controlled migration of colorants to zones of faster drying on the fabric surfaces, allows in line equipment to be employed, thereby making the process easier, and quicker, and more economical. The inventive concept is applicable to all fabric compositions, including glass fabrics, synthetic fabrics, etc.

Another problem that has existed heretofore with conventional dyeing and printing apparatus is that when different colorants were applied to the same or opposite surfaces of a fabric, preventing the penetration of one colorant to the other side of the fabric or to specific portions on the fabric was most difficult, and application of a second colorant ruined or completely changed the color of the first colorant.

However, when fabrics are treated in accordance with the inventive concepts hereinafter described in more detail, fabrics are obtained that show color or depth on opposed surfaces of the fabric and/or designs comprising different color or depth thereon, and further, show a good contrast in color depth and tone.

it is therefore an object of the present invention to produce decorative effects on fabrics composed of any and all types of materials.

Another object is the provision of methods for producing color reversible glass fabrics by controlled color migration of dyestuffs.

A further object is the provision of a method for producing specific and various designs on the surfaces of glass fabrics by thermal printing.

Treated fabrics, when finished according to the concepts of this invention, possess the advantages of having color reversible surfaces thereon, thereby enabling users to take advantage of more and various color schemes with the same single fabric and of having designs on either or both sides of the fabric surfaces without the fabric having had to go through a cumbersome process such as silk screening.

Finished fabrics, when treated according to the concepts of this invention show unique utility in the drapery, bedspread, tablecloth, and wearing apparel fields.

Other objects and advantages of the invention will be apparent from the following description.

SUMMARY OF THE INVENTION The processes described herein comprise the utilization of conventional heat cleaning apparatus and padding apparatus in order to impart lasting color to glass fiber fabrics. This apparatus shows (1) a heat cleaning and weave set over, (2) a finishing and padding unit, and (3) a drying oven. The improvement in the present process lies in the treatment of the fabric just after each padding operation while the fabric is still wet with a colorant.

It has been discovered that unique and decorative effects may be imparted to fabrics when they are treated in accordance with the present inventive concepts. Accordingly, when a heated rotating surface, such as a mandrel, having a solid surface or having perforations therein or embossments thereon, is put in line" and located just after the padders and before the drying ovens, a phenomena is observed wherein the wet colorant migrates to that part of the fabric which is highest in temperature, as a result of the fabric being in contact with the heated mandrel. This phenomena occurs in glass fiber fabrics as well as in conventional fabrics even though the properties inherent in the former differ vastly from those of the latter.

By controlling the rate of surface drying for various zones of a fabric, variations in color, depth, and tone are created. The zones may comprise the entire surface of one side of the fabric or multiple sites on one or both sides of the fabric. The principle behind the inventive concept is that increased evaporation of the colorant media occurs at the zones of faster drying whereupon dye particles, dispersed through the dye media, migrate toward the faster drying surface zones through a Brownian movement effect. When the colorant media is evaporated in an oven or by other heating means that provide for the slightest temperature differential or unbalanced air velocity between the top and bottom surfaces of a fabric, all movement of the dye particles stops, the result of which is a higher concentration of the dye particles on or near the faster drying zone. The slightest differential in temperature will cause movement of dye particles, but as the differential is increased, say from l0250 F the migration effect increases and the time for this effect decreases. The same can be said about unbalanced hot air velocity from one side of the fabric to the other, i.e., as the velocity is increased, the migration effect is also increased. When the process is repeated and the opposite surface of the fabric has a faster surface drying zone, the use of a differently colored colorant will not destructively contaminate the first colorant on the other side of the fabric, for again, there is controlled color migration. The resulting fabric possesses a difierent color on each of the surfaces, thereby yielding a reversible fabric.

The same color reversible fabric is obtained when two fabrics are padded through the same resin-bondable colorant finish and before passing through a conventional curing oven, are put face to face, i.e., one on top of the other or in side by side relationship. In this manner, the zones of faster surface drying are the outside surfaces of the fabrics, and color migration deposits the colorant on these outside surfaces of the fabrics while leaving the inside face-to-face surfaces of the fabrics substantially void of any colorant. When the fabrics are padded through a second finish comprising a different colorant and again put face to face, having the surfaces that were on the inside now on the outside, and passed through a conventional curing oven, color migration is again effected to the new outside surfaces of the fabrics while leaving the inner surfaces substantially void of any of the second colorant. The resulting fabrics both possess the reversible look, i.e., each have a different colorant on each surface thereof.

Such a reversible fabric, heretofore had not been obtainable except by the sewing together of two differently colored fabrics. The fabrics, treated in accordance with out inventive concept have the advantages of being more functional in various color schemes, being single ply, lightweight, and possessing excellent contrasting colors.

Another embodiment within this concept of color migration is presented when a single ply fabric is passed through only one padding operation whose surfaces thereof are subsequently exposed to a temperature differential created by an oven or other heating means sufficient to cause color migration when the fabric proceeds therethrough. As the fabric passes through the oven, or other heating means, each surface thereof is exposed to a different temperature, thereby leaving a larger concentration of colorant on that surface which has been exposed to the higher temperature. Such a procedure produces a fabric that has only one colorant thereon but possesses a different color depth or tone on each side of the fabric as a result of the different heating zones.

A further embodiment within this same concept is presented by employing a heated mandrel hereinafter described in greater detail, having a uniformly interrupted surface, with perforations therein or embossments thereon, to effect the desired color migration. The diameter of the mandrel is dependent upon the speed at which the fabric passes over said mandrel and is also dependent upon the colorant media and pigment particle size. The mandrel s rotation is controlled by the speed of the finished fabric passing in a frictional relationship with the mandrel.

A still further embodiment is presented by employing air jets arranged in a band transverse to the flow of the finished fabric or in any other arrangement. When a bank of air jets is operating continuously, a somewhat striped effect is established on the fabric whereas when the air jets are operating intermittently, a patterned effect is established on the fabric. When air is fanned over the entire width of the fabric as it passes through a multiple pass oven the effect is to migrate the colorant in the finish to the side of the fabric exposed to the source of the air, thereby creating a uniform color on one side of the fabric, and wherein the effect is increased as the velocity of the air is increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevational view of apparatus for carrying out the invention;

FIG. 2 is a side elevational view of another form of apparatus for carrying out the invention;

FIG. 3 is a side elevational view of apparatus for carrying out the invention,

FIG. 4 is a fragmentary plan view on line 4-4 of FIG. 3;

FIG. 5 is a side elevational view of apparatus for carrying out the invention;

FIG. 6 is a side elevational view of apparatus for carrying out the invention;

FIG. 7 is a side elevation view of apparatus for carrying out the invention; and

FIG. 8 is a side elevational view of apparatus for carrying out the invention.

The apparatus of FIG. 1 comprises a payoff stand it), supporting a payoff roll 11, wherein greige glass fabric 12 is fed over guide roll 13 and advanced between a pair of heating elements 14, 14 located in a heat cleaning and weave set oven 15. The heat cleaned fabric 16 is advanced through a first resinbondable colorant finish solution 17 and subsequently through a pair of padder rolls 18, 19, the latter being adjustable to squeeze out excess finish. The padder rolls l8, 19 are large diameter, rubber covered rolls, having a Shore A" Durometer hardness of about 65. The padded fabric with first finish 20 is advanced through a slot in an oven 21 created by heating elements 22 and a cooling element 23, wherein the cooling element 23 is juxtaposed above the heating elements 22. As the padded fabric with first finish 20 passes through the slot in the oven 21, colorant from the first finish solution 17 is caused by the heating elements 22 to migrate toward the heat source, so that upon exit from oven 21, the fabric has the colorant of the first finish on its bottom surface 24.

The fabric 24 is advanced over guide roll 25 and through a second finish solution 26 and through a pair of padder rolls 27, 28, the latter being adjustable to squeeze out excess finish. Subsequently thereto, the padded fabric with second finish 29 thereon is passed through a slot in oven 30 created by heating elements 31 juxtaposed above cooling element 32, wherein the colorant of the second finish is caused by the heating elements 31 to migrate toward the heat source, so that upon exit from the oven 30 the fabric 33 has the colorant of the second finish on the top surface and the colorant of the first finish on the bottom surface thereof. The fabric 33 is fed over guide roll 34 and gathered on a takeup roll 35 supported on a takeup stand 36. The net result is that there is one colorant located on one side of the fabric and a second colorant located on the other side, thereby providing users with a high degree of flexibility in color schemes.

FIG. 2 shows another embodiment wherein padded fabric 37 with first finish, is passed over and in contact with a large rotating heated roll 38, the dwell time of the fabric in contact with the heated roll 38 being sufficient to cause migration of the colorant from the first finish to the top surface of the fabric, contra to the direction of migration when the heat source does not contact the fabric. As the fabric with first finish on the top surface 39 is advanced through a multiple pass oven 40, the location of the colorant from the first finish is set. The fabric 39 is advanced over guide roll 41 and through a second finish solution 42 and subsequently over guide roll 43 and under and in contact with a large rotating heated roll 44, wherein the dwell time of the fabrics contact with the heated roll 44 is sufficient to cause migration of the colorant from the second finish to the bottom surface of the fabric. Thereafter, the fabric is advanced through a multiple pass oven 45 to set the location of the colorant from the second finish, The net result is a fabric 46 having a first colorant on the top surface and a second colorant on the bottom surface.

FIG. 3 shows still another embodiment wherein two payoff rolls 47, 47 of heat cleaned fabric 48, 48 are payed off between a pair of tension rolls 49, 49 so that the two fabrics are aligned one on top of the other. The two aligned fabrics 48, 48 are passed over guide roll 50 and through a first resinbondable colorant finish solution 51, with an immersion roll 52 therein and subsequently run through a pair of padder rolls 53, 54, the latter being adjustable to squeeze out excess finish, and passed over guide roll 55 and through a multiple pass oven 56. The effect of passing the two fabrics 57, 57 with first finish thereon through oven 56 is that the colorant in the first finish is caused to migrate toward the heat source, and deposit on the outer surfaces of the fabrics 58, 58. The two fabrics S8, 58 are then passed through a pair of rolls 59,60, the former being driven and the latter being an idler. The two fabrics, after exit from rolls 59, 60 are separated and passed over and in contact with two pairs of angled guide rolls 61a, 61 b, 61c, 61d so that each fabric contacts a pair of angled guide rolls 61a, 61b and 61c, 61d which are capable of realigning the fabrics 58, 58 one on top of the other but what were the outer surfaces thereof, are now the inner surfaces, and the new outer surfaces are substantially void of any colorant from the first finish. Pull rolls 62, 63 advanced the fabrics 58, 58 over guide roll 64 and through a second resin colorant finish solution 65 and subsequently through a pair of padder rolls 66, 67, the latter being adjustable to remove excess second finish from the fabrics 69, 69 with second finish thereon and further advanced over guide roll 68 and through multiple pass oven 70 so that upon exit therefrom fabrics 71, 71 have a first finish on their inner surfaces and a second finish on their outer surfaces. Takeup rolls 72, 72 gather the treated fabrics, which are both color reversible.

FIG. 4 shows a fragmentary plan view on line 4-4 of FIG. 3 wherein the positions of the angled idler rolls 61a, 61b, 61c, 61d are more clearly depicted. In the pair of angled idler rolls 61a, 61b controlling the top fabric 58 the first roll 61a of the pair to contact the fabric 58 is positioned below the fabric and the second roll 61b of the pair is located above the fabric 58. Conversely, for the bottom fabric 58 the first roll 61c of the other pair of rolls 61c, 61:! is positioned on top thereof and the second roll 61d is located below, so that the net effect of the angled idler rolls 61a, 61b, 61c, 61d on the two fabrics 58, 58 is that upon entrance into pull rolls 62, 63, the fabric 58 that was on top, is now slipped on the bottom and conversely, the previously bottom fabric 58 is now on top. This provides two new outer fabric surfaces, substantially void of any colorant from the first finish solution 51.

FIG. 5 shows a further embodiment wherein two payoff rolls 73, 73 of greige glass fabric 74, 74, are fed over guide rolls 75, 75 for entry into a heat clean and weave set oven 76, comprising two sets of heating elements 77, 77 each set forming a slot for the fabrics 74, 74, to pass therebetween. The heat-cleaned fabrics 78, 78 emerge from oven 76 and pass over guide roll 79 for surface to surface alignment. The fabrics 78, 78 are advanced through a first finish solution 80, and then through padder rolls 81, 82, the latter being adjustable for removal of excess finish. Tension rolls 84, 84 are used to separate the padded fabrics with first finish 83, 83 thereon and for controlling the dwell time of the inner surfaces of the fabrics in contact with large rotating heated rolls 85, 85 sufficient for causing migration and deposition of colorant from the first finish to the outer surfaces of each fabric. Rolls 86, 87, the former being driven and the latter being an idler, gather the fabrics 88, 88 having their outer surfaces with first finish thereon. Drying oven 89 wherein multiple passes of the fabrics are made, dries the fabrics 88, 88 and subsequently the latter are advanced over guide rolls 90, 90 and through a second finish solution 91. Padder rolls 92, 93 squeeze out excess finish. Fabrics 94, 94, with the second finish thereon are separated again via tension rolls 95, 95 that are positioned so as to expose the outer surfaces of the fabrics with large rotating heated rolls 96, 96 wherein sufficient dwell time is maintained for the colorant from the second finish solution 91 to migrate and deposit on the inner surfaces of each fabric. The net effect is therefore to produce two fabrics 97, 97 having a first colorant on the outer surfaces and a second colorant on the inner surfaces thereof. The two fabrics 97, 97 are gathered by pull rolls 98, 99 and pulled through a multiple pass oven 100 in which the colorants are firmly established on the fabrics 97, 97, passed over guide roll 101, and separated and gathered on takeup rolls 102, 102 supported by takeup stand 103.

FIG. 6 shows still another embodiment wherein after heat cleaned glass fabric 104 is padded through an aqueous finish solution 105, the excess finish is eliminated by padder rolls 106, 107, the former being driven and the latter being an idler. The fabric 108 with first finish is brought into contact with a heated, rotating roll having a disruptive surface 110, supported by stand 111 wherein the dwell time of the fabric in contact with the rotating roll is controlled by tension rolls 109, 109 sufficient to cause migration and deposition of colorant from the aqueous finish 105 to only that part of the fabric contacting the heated roll. The net effect is a fabric 112 having a uniform pattern thereon, which is dried in a multiple pass oven I13 and passed over guide roll I14 and gathered on takeup roll 115 supported by a stand 116.

FIG. 7 shows yet another embodiment, wherein heatcleaned fabric 117 is padded through a first finish solution 118, and then through padder rolls 119, 120 to squeeze out excess finish. The fabric 121 with first finish uniformly distributed thereon is advanced through a multiple pass oven 122 to set the finish uniformly on both sides of the fabric. The uniformly finished fabric 121 is passed through a second finish solution 123 and then through padder rolls I24, 125 to squeeze out excess finish. The fabric 126, while wet with second finish, is then made to contact a heated rotating perforated roll 128, supported by stand 129 via tension rolls I27, 127 for a sufficient time to cause migration and deposition of the colorant from the second finish to that part of the fabric that actually contacts the heated surface of the roll 128. This produces a fabric having a pattern thereon comprising colorant from the first finish on that part of the fabric which did not contact the heated roll 128 and colorant from the second finish on that part that actually contacted the heated roll 128. The fabric 130 is advanced to. a multiple pass oven 131 and on emergence therefrom is passed over guide roll 132 and gathered on takeup roll 133 supported by stand 134.

FIG. 8 shows another embodiment wherein a uniformly finished fabric 135 is passed through a finish solution 136, and through padder rolls 137, 138. Tension roll 139 controls the dwell time of the fabric in contact with the heated rotating embossed roll 140 sufficient to cause migration and deposition of the colorant from the finish to that part of the fabric that actually contacts the heated embossments of roll 140 so that a pattern is produced thereon. The fabric 141 with a pattern thereon is subjected to compressive forces by passing the fabric 141 through a nip formed by the heated rotating embossed roll 140 and a resilient roll 142 acting in a cooperating relationship. The effect of the heated rotating embossed roll 140 and the resilient roll 142 working in a cooperating relationship is to cause permanent deformation in the fabric when the latter contacts the heated embossments on roll 140. Therefore an embossed, patterned fabric 143 is produced. Fabric 143 comprises colorant from the uniformly finished fabric which did not contact the heated embossments of roll 140 and colorant from the finish on the embossed part of the fabric that contacted the heated embossments of roll 140. Fabric 143 is advanced through a multiple pass oven 144 for drying, pulled over guide roll 145 and gathered on takeup roll 146, which is supported on stand 147.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following examples are provided as a basis to more distinctly point out the inventive concepts but which in no way limit these concepts.

EXAMPLE I In using the apparatus of FIG. 1, glass fabric was taken from a feed roll 11 and passed through an oven 15 for heat setting the fibers making up the fabric and for removal of protective sizing. The fabric 16 was advanced to a first dip tank containing a finish solution 17 comprising a first colorant and subsequently passed through the nip ofa first pair of squeeze rolls 18, 19. Subsequently the finished fabric was passed through a first oven 21 comprising a passage formed by a cooling element 23 above and heating elements 22 below the fabric, such that a temperature differential was established from one surface of the fabric to the other. The slightest temperature differential from one surface of the fabric to the other is sufficient to cause migration of colorant but as the temperature differential is increased, the degree of contrast is increased, for the degree of migration has increased. The first colorant migrated to that surface of the fabric nearest the heating elements. The fabric 24 then continued along its way to a second dip tank containing a finish solution 26 comprising a second colorant and subsequently passed through the nip of a second pair of squeeze rolls 27, 28. Subsequently thereto, the treated fabric was passed through a second oven 30 comprising a passage formed by a cooling element 32 below and heating elements 31 above the fabric surfaces, such that a temperature differential was established from one surface of the fabric to the other. The second colorant migrated to that part of the fabric nearest the heating elements. Subsequently, the fabric 33 was gathered on a takeup roll.

The overall effect on the fabric 33 from the two color migrations was to permanently place the first colorant on one surface of the fabric and the second colorant on the other surface, thereby producing a color reversible fabric.

Any number of various finishes adaptable to glass fabrics and various colorant combinations may be used.

EXAMPLE I] A glass fabric woven from continuous filamentary yarns was fed from a feed roll into an oven to remove its protective sizing therefrom and to heat set the fibers making up the fabric.

Subsequently, the heat-cleaned fabric was passed through a first dip tank containing a finish comprising a first colorant and then passed through the nip of a first pair of squeeze rolls to remove excess finish therefrom. Subsequently thereto, the finished fabric 37 was passed over and in contact with a first rotating heated surface 38 in FIG. 2, e.g., a drum or mandrel, to first effect migration of the first colorant to the outer side of the fabric not in contact with the heated surface 38, and then the fabric 39, was advanced through a first conventional multiple pass oven 40 for drying. Subsequently, the fabric 39 was advanced through a second dip tank containing a finish solution 42 comprising a second colorant and then passed through the nip of a second pair of squeeze rolls. Subsequently, the finished fabric was passed over and in contact with a second rotating heated surface 44, such that the side of the fabric that was not in contact with the first-heated surface, contacted the second rotating surface 44 so that migration of the second colorant was effected on that side not in contact with the heated surface 44. The fabric 46 was then advanced through a second conventional oven for drying.

The overall effect of the above method was the production of a color reversible fabric, composed of a first colorant on one side thereof and a second colorant on the other.

The above method has been used on various type weaves in glass fabrics, e.g., plain and open. Fabrics woven of textured yarn have been treated in a like manner and were rendered color reversible, but the migration of color on textured fabrics was to that surface of the fabric that actually contacted the heated roll, whereas when fabrics, woven of continuous, filamentary yarn were dyed and put in contact with a heated roll, the migration of color was to that surface not in contact with the heated roll.

The percentage pickup of finish on fabrics composed of continuous, filamentary glass yarns as compared to fabrics composed of textured glass yarns is as follows: in the former the percent pickup ranges from 0.l25.0 percent and in the latter the percent pickup ranges from 0.5-50.0 percent. The percent pickup for fabrics composed of natural or organic fibers is even larger, ranging up to 100200 percent. The importance of percent pickup arises in the degree of color contrast that is desired, wherein as the percent pickup is increased, so too is the amount of migration of colorant, thereby increasing contrast of colors on the fabric.

EXAMPLE III Two heat-cleaned glass fabrics 48, 48 were placed in a faceto-face relationship in FIG. 3 and padded with a finish solution 51 comprising a first colorant and subsequently passed through the nip of a first pair of squeeze rolls. All finish compositions and aqueous colorant combinations were found suitable; the following is shown by way of example and not by limitation.

it: by Volume Constituents Finish A 8.0% Epoxidizcd soyabcun oil in a 45% emulsion of ethoxylatcd nonyl phenol Finish A 5.0% Aqueous emulsion of an acrylic copolymer solids of 46.0%

Finish A L592 Glycidoxypropyltrimethoxysilane in methanol 2.0% Red iron oxide, aqueous dispersion having 30.0% solids 83.5% Water The finished fabrics 57, 57 were cured at 350 F. for approximately 3 minutes in a conventional multiple pass oven 56. It was observed that the inside surfaces of the fabrics were void of any substantial pigment concentrations, whereas the outer surfaces of the fabrics 58, 58, exposed to the curing tcm perature, had a uniform high quality concentration of the colorant.

The two fabrics were then put through a separating device comprising two pairs of pull rolls 59, 60 and 62, 63 and two pairs of angled guide rolls 61a, 61b, and 61c, 61d. This device reversed the surfaces of the fabrics, i.e., those surfaces with the high pigment pickup were put face to face, and subsequently padded with the following finish and cured at 350 F. for 3 minutes in a multiple pass oven 70.

Percent by Volume Constituents 14.5% Finish A 2.0% Phthalocyanine blue aqueous dispersion having 19.80% solids 83.5% water EXAM PLE IV A heat-cleaned glass fabric composed of woven continuous filament strands was padded with the following composition:

Percent by Volume Constituents 14.5% Finish A 5.0% Phthalocyanine green aqueous dispersion having 25.85% solids 80.5% Water The wet, padded fabric was passed over and in contact with a heated surface with the temperature between 350375 F. until color migration was effected and subsequently dried in a conventional multiple pass oven. The resulting fabric possessed only one colorant, but through color migration the color tone and depth varied on each surface of the fabric.

The same method was used to make a color reversible fabric from a resin-pigmented finished glass fiber fabric. The resulting fabric contained the initial finish on one side of the fabric and the composition as described above on the other side thereof thereby imparting reversibility thereto.

EXAMPLE V, VI

Two heat-cleaned glass fabrics, one composed of continuous filament strands and the other composed of textured yarns, were padded separately with a composition comprising 14.5 percent Finish A, 2.0 percent phthalocyanine blue aqueous dispersion having 19.80 percent solids, and 83.5 percent water and while wet were placed separately over and in contact with a rotating heated grid, e.g., a screen. Heated air was blown through the screening toward the fabrics. The end results were reversible fabrics which carried along the design of the screening, and wherein the higher amount of pigment concentration was on that surface of the fabric which was exposed to the heated air.

EXAMPLE VII Two glass fiber fabrics were fed from two spaced-apart feed rolls 73, 73 in FIG. and advanced through a heat cleaning and weave set oven 76 containing two separate chambers, created by two pairs of heating elements 77, 77, 77, 77, to remove its protective sizing and to heat set the fibers making up the fabric. Subsequently thereto, the fabrics 78, 78 were advanced to a guide roll 79 whereby the two fabrics were aligned in a touching relationship one on top of the other under tension and further advanced to a first dip tank containing a finish solution 80 comprising a first colorant. The finished fabrics 83, 83 were subsequently passed through a first pair of padder rolls 81, 82 to remove excess finish and then through a first pair of tension rolls 84, 84 used to separate the wet finished fabrics 83, 83 and for controlling the dwell time of the fabrics in contact with a first pair of large rotating heated rolls 85, 85, sufficient to cause migration of the first colorant to the outer surfaces of each fabric 88, 88. Fabrics 88, 88 were gathered by pull rolls 86, 87 and advanced to a conventional oven 89 to set the location of the first colorant and to dry the finish thereon.

Subsequently the fabrics 88, 88 were advanced through a second dip tank containing a finish solution 91 comprising a second colorant. The two fabrics were then advanced through a second pair of padder rolls 92, 93 to remove excess finish therefrom.

Subsequently, the surfaces of the fabrics that did not contact rolls 85, 85 were put in contact with heated rolls 96, 96 so that the second colorant migrated to the inner surfaces of the fabrics. The location of the second colorant was set and the finished dried on the fabrics by passing the fabrics through a conventional multiple pass oven.

The color reversible effect was observed when a textured and a knit fabric were put face to face; likewise the effect was similar when a knit and a casement fabric were put face to face. Therefore the attainment of color reversible fabrics may be accomplished by using any of a number of different weave combinations and by a combination of various finishes containing colorants. The degree of color migration is dependent upon the intensity of the heat applied during the drying or curing step and also upon the viscosity of the dye media and particle size of the colorants.

The above examples are embodiments of the color migration concept wherein a color reversible fabric was desired. However when a print or design is desired on the fabric, the above finishes may be used wherein the finished fabric, while wet, is passed over and in contact with a heated, interrupted surface, such as a rotating mandrel with perforations therein or embossments thereon. The effect of the heated mandrel on the wet, finished fabric is that color migration occurs at the zones of faster drying, i.e., the area of the mandrel that actually contacts the fabric. The mandrel may be heated by internal means or by radiant heat. Generally the heated mandrel will require a higher temperature to effect a design on textured or bulky fabrics than that required for casement or plain fabrics. Sometimes it is preferable to put embossments on the fabric as well as designs or prints thereon. This effect is produced by passing the wet, finished fabric through two heated intermeshed, embossed rolls or through a heated em bossed roll and a resilient roll working in a cooperating relationship.

The temperature of the mandrels ranged between 300-500 F., depending on the thickness of the fabric, which was sufficient to effect color migration. The temperature range used herein is dependent upon the dwell time of the fabric when in juxtaposition with the rotating heated mandrel, which is further dependent upon the speed of the fabric passing thereover. The examples hereinafter disclosed were run at speeds of 25-50 feet per minute, which was a limitation of the equipment used. it must be pointed out that the temperature range of the heated mandrel is further dependent upon the moisture content of the fabric, which is picked up when it passes through the padder rolls. Padder pressure determines the amount of moisture content, but the type of fabric, i.e., casement or textured, is also a factor, and up to 25 percent pickup for the former and 50 percent pickup for the latter are common. As the moisture content increases, the temperature must also be increased to effect the color migration. Higher temperatures than that needed to effect color migration with a heated, perforated mandrel is not damaging, but in fact might be desirable because permanent surface embossments are produced on the fabric when the temperature approaches l,200 F. at a fabric speed of 25-50 feet per minute.

The following examples are provided to point out more distinctly the concepts but are in no way intended to limit the invention.

EXAMPLE Vlll A greige glass fiber fabric was taken from a feed roll and passed through an oven to remove its protective sizing therefrom and to heat set the weave of the fabric. The fabric 104 in FIG. 6 was advanced to a dip tank containing a finish solution 105 comprising an aqueous colorant and subsequently passed through the nip formed by a pair of resilient squeeze rolls, 106, 107. The finished fabric while still wet 108, was passed over, and in frictional engagement with a heated rotating disruptive surface 110. The temperature of the heated surface ranged from about 350-500 F. depending upon the moisture content after the fabric passed through the squeeze rolls and also upon the colorant used, sufficient to cause color migration of the colorant to that part of the fabric 112 that actually contacted the heated surface to thereby effect a pattern thereon. The fabric 112 continued on and passed through a conventional multiple pass oven 113 for drying the finish on the fabric 112, whereby it was observed that a permanent uniform pattern was on the fabric. An optional padding with a 3-5 percent stearato chromic chloride aqueous solution and subsequent drying, after the oven drying of the finished fabric helps the washfastness of the colorant thereon. The fabric was then gathered on a takeup roll.

The above-described method was tried and observed to work well on previously heat cleaned fabrics and on finished fabrics previously colored with a colorant. With the latter, a second colorant of different color was used to make the pattern on the glass fabric for a contrasting appearance whereby the colorant of the previously colored fabric served as a background for the second colorant on that part of the fabric not contacting the rotating surface 110.

EXAMPLE [X A glass fiber fabric was fed from a feed roll to an oven to remove its protective sizing therefrom and to permanently set the weave of the fabric. The fabric 117 in FIG. 7 was advanced through a first dip tank containing an aqueous finish composition 118 comprising a first colorant. Subsequently thereto the fabric was passed through the nip of a first pair of padder rolls 119, 120 to squeeze out excess finish and then advanced to a conventional multiple pass drying oven 122 whereby a uniform color appeared throughout the fabric. The finished fabric 121 with first finish thereon was then passed through a second dip tank containing an aqueous finish composition 123 comprising a second colorant. Subsequently thereto, the fabric was passed through the nip of a second pair of padder rolls 124, 125 to squeeze out excess finish and while still wet, passed over, and in frictional engagement with a rotating heated disruptive surface 128, whereby only parts of the fabric actually contacted the heated surface 128. The speed of the heated surface 128 was controlled by the speed of the fabric passing thereover whereby the speed of the former was dependent upon fabric thickness, fabric weave, and moisture content; all factors in the rate of a colorant migrating to a higher heating surface zone. The fabric 130 now with a pattern thereon comprising the second colorant on that part of the fabric that actually contacted the heated surface 128 and the first colorant on that part of the fabric that did not contact the heated surface 128. The fabric 130 was advanced to a conventional multiple pass oven for curing and subsequently gathered on a takeup roll.

An optional padding with a stearato chromic chloride complex to insure the washfastness of the fabric may be applied and dried just before the takeup roll.

The above-described process may be used on heat cleaned fabrics and on previously finished fabrics, thereby eliminating the need for an oven to remove protective sizing from the fabrics.

EXAMPLE X A glass fiber fabric was delivered from a feed roll into an oven to remove its protective sizing and to set the weave of the fabric. The heat treated fabric was advanced through a first dip tank containing an aqueous finish comprising a first colorant and then passed through a nip of a first pair of padder rolls to squeeze out excess finish. The fabric passed through a conventional multiple pass drying oven, all of which is not shown. Fabric 135 with the first colorant dried thereon was advanced through a second dip tank containing an aqueous finish composition 136 of FIG. 8 comprising a second colorant. The finished fabric was then passed through a nip formed by a second pair of padder rolls 137, 138 to squeeze out excess finish and while still wet, passed over and in contact with a rotating heated surface 140 with embossments thereon. The second colorant migrated to that part of the fabric that actually contacted the embossments on roll 140. The fabric was held in contact with the roll 140 until it passed through a nip formed by roli 140 and a resilient roll 142. Permanent embossments on fabric 143 coinciding with the second colorant on the fabric were established by passing the fabric through this nip. The fabric 143 was further advanced into a conventional multiple pass drying oven 144 and gathered on a takeup roll.

EXAMPLE Xi A cotton/Dacron fabric was payed off a feed roll and advanced through a dip tank containing an aqueous finish comprising a first colorant and then passed through a nip of a first pair of padder rolls to squeeze out excess finish. Migration of the first colorant to one side of the fabric was effected by causing the slightest temperature differential from one side of the fabric to the other. The location of the colorant was set and the finish dried on the fabric by passing the fabric through a conventional multiple pass oven. This treated fabric was then advanced through a dip tank containing an aqueous finish comprising a second colorant, wherein excess finish was expelled therefrom by the use of padder rolls. Migration of the second colorant to the other side of the fabric was effected by the slightest temperature differential, the higher temperature being on this other side of the fabric. Subsequently, the fabric was passed through a multiple pass oven for drying and setting the location of the second colorant. The resultant effect of the above was a color reversible fabric, having the first colorant on one side and the second colorant on the other side thereof.

EXAMPLE Xll A cotton/Dacron fabric was treated in accordance with example X, except that after the finish comprising a second colorant was applied to the fabric, it was contacted with a heated, rotating roll, having a disruptive surface thereon, whereby only part of the fabric was able to actually contact the roll. The effect of the heated roll in contact with the wetfinished fabric was that it caused migration of the second colorant to that part of the fabric that actually contacted the roll. The overall effect on the fabric was to produce a uniform pattern, comprising the first colorant on that part of the fabric that did not contact the roll and the second colorant on that part of the fabric that did contact the roll.

it will be apparent from the foregoing that we have provided new methods for finishing fabrics whereby the resulting fabrics have improved aesthetic characteristics.

It will be understood that changes may be made in the formulations of the various finishes and in the methods of providing controlled unbalanced surface drying zones on a fabric to effect color migration, without departing from the spirit of the invention, especially as defined in the following claims.

We claim:

1. A method for producing a decorative, color reversible glass fiber fabric, comprising the steps of:

a. heating the fabric to remove its protective sizing so that a heat cleaned fabric is obtained:

b. passing the heat cleaned fabric through a first aqueous finish comprising a first resin bondable pigment dispersron;

c. removing excess first finish from the fabric so that a transfer of said first finish to the fabric in an amount of between about 0.1 percent and 50.0 percent is obtained;

(1. passing the fabric with first finish through a first unbalanced heating zone sufficient to cause the pigment from the first finish to migrate and lodge on substantially only one surface of said fabric;

e. drying the fabric to permanently establish the location of the pigment from the first finish;

f. passing the dried fabric through a second finish comprising a second aqueous resin bondable pigment dispersion;

g. removing excess second finish from the fabric so that a transfer of said second finish to the fabric in an amount of between about 0.1 percent and 50.0 percent is obtained;

h. passing the fabric with second finish through a second unbalanced heating zone sufficient to cause the pigment from the second finish to migrate and lodge substantially only on the other surface of the fabric; and

i. drying the fabric to permanently establish the location of the pigment from the second finish, whereby substantially all of the pigment from the first finish is on one side of the fabric and substantially all of the pigment from the second finish is on the other side of the fabric.

2. The method as claimed in claim 1 wherein the fabrics one surface is heated more than the other in said first heating zone of step (d) so that a first temperature differential of from at least 10 to 250 F. exists from the one surface to the other, causing the first pigment to migrate to said one surface and wherein the fabric s other surface is heated more than the said one surface in said second heating zone of step (b) so that a second temperature differential of from at least 10 to 250 F. exists from said other surface to said one surface, causing the second pigment to migrate to said other surface.

3. A method for producing decorative color reversible glass fiber fabrics, comprising the steps of:

a. advancing two heat-cleaned glass fiber fabrics in contact one with the other through a first finish comprising a first aqueous resin bondable pigment dispersion;

b. removing excess first finish from the fabrics to deposit from about 0.1 percent to 50.0 percent of the first finish thereon;

c. drying the fabrics and first finish while in contact so that a first temperature differential of from at least l0 to 250 F. exists between the inner and outer surfaces of said fabrics sufficient to cause the pigment from the first finish to migrate and lodge on the outer surfaces of the fabrics;

d. reversing the fabric surfaces so that the former inner and outer surfaces become the present outer and inner surfaces respectively;

e. advancing the dried fabrics while in contact through a second finish comprising a second aqueous resin bondable pigment dispersion;

f. removing excess second finish from the fabrics to deposit from about 0.1 percent to 50.0 percent of the second finish thereon; and

3 ,63 2 ,3 8 ll g. drying the fabrics and second finish while in contact so that a second temperature differential of from at least 10 to 250 F. exists between the present inner and outer surfaces of said fabrics sufficient to cause the pigment from the second finish to migrate and lodge on the present 5 outer surfaces of the fabrics, whereby substantially all of the pigment from the first finish is on one side of each fabric and substantially all of the pigment from the second finish is on the other side thereof. 4. A method for producing a decorative color reversible glass fabric comprising the steps of:

a. advancing heat-cleaned and weave set fabric through a k. drying the fabrics to permanently establish the position of the pigment from the second finish; and l. collecting the fabrics, wherein the net effect is the production of two fabrics having substantially all of the pigment from the first finish on one surface and substantially all of the pigment from the second finish on the other surface.

6. A method for producing decorative patterns on glass fiber fabric, comprising the steps of:

a. heating the fabric to remove its protective sizing so that a heat-cleaned fabric is obtained;

first finish comprising a first aqueous resin bondable pigment dispersion;

b. advancing the heat-cleaned fabric through a finish comprising at least one aqueous resin bondable pigment dispersion;

removlhg excess first hhlsh from the fabnc h c. removing excess finish so that a transfer to the fabric of hmoum of from percfem to percent of Sam fimsh between about 0.1 percent to 50.0 percent of the finish is lS transferred to the fabric; obtained whachng one fabric with first finish d. contactihg the fabric while wet with the finish, with 2! g i g z l ii g 5? zii g i g g rotating heated surface having a disruptive facing, so that h g p g a uniform pattern appears on the fabric by the migration inis to the surface not in contact with the first heated and disposition of a greater amount of the p g on surface;

drying the fabric having the pigment from the first finish that part of the fabric that actually contacts the heated on sl a psltlantilally only one surface thereof t perm n n ly 5 e t ir ii rfg 3: finished fabric in a heating zone to peresta 18 its ocation;

e. advancing the dried fabric through a second finish commahehhy Sm the pattern on the fabnc v prising a Second aqueous resin bondable pigment disper whereby the pattern on the glass fiber fabric uniformly apsion; pears on both surfaces of the fabric.

f. removing excess second finish from the fabric so that an A nlethod 9? Producing decorative Patterns glass amount of from 0.1 percent to 50.0 percent of said fiber fabnc comprlsmg the Steps of:

Second fi i h i transferred {0 th f b i a. heating the fabric to remove its protective sizing so that a g. contacting the other surface of the fabric while wet with heat cleaned fabric is obtained;

second finish, with a second rotating heated surface for a b. passing the heat cleaned fabric through a first finish comsufficient time to cause migration of the pigment from the prising a first aqueous resin bondable pigment dispersion; second finish to the surface not in contact with the second c. squeezing out excess first finish so that an amount of heated surface; and between 0.1 percent and 50.0 percent of the first finish is h. drying the fabric having the pigment from the second transferred to the fabric;

finish on substantially only one surface the eof to pe d. drying the fabric with first finish through a constant temmanemly establish its location, perature heating zone, so that a uniform color appears on whereby the net effect of said method is a fabric comprising substantially all of the pigment from the first finish on one side 6 and substantially all of the pigment from the second finish on both surfaces of the fabric; passing the dried fabric through a second finish comprising a second aqueous resin bondable pigment dispersion;

fabrics contacting the rolls; drying the fabrics to permanently establish the position of the pigment from the first finish thereon;

the other side thereof: f. squeezing the fabric with second finish sufficiently to Yhethod for produclhg decorahve glass fiber fabncs, transfer an amount of between 0.1 percent and 50.0 percomphslhg h Steps of: cent of the second finish thereon;

hdvahchg two gre'ge 3 fabncs a heat'heahhg g. contacting the fabric having the dry first finish and wet zohe to hemove protective 512mg therefrom; second finish thereon with a rotating heated surface havb. converging the heat treated fabrics so that they contact ing a uniform discontinuous facing, wherein the temper? one hhother m a hered mahhhr; ture is sufficient to cause substantially all of the pigment passmg the heat-treated fabrics whlle Fonmct h from the second finish to migrate to only that part of the another through f msh compnsmg a first resm fabric that actually contacts the heated surface;and bondable plgmem dlspersion h. drying the fabric in a heating zone to permanently set the d. removing excess first finish from the fabrics so that an location Ofthe p g from the Second finish g xgs g gfg g zfsg g' percent by wmght of whereby the total effect on both surfaces of the glass fiber e. separating and subsequently contacting the inner surfaces gi z zg g i 2 :22: r g gz gggz ggg g h of the fabrics, while wet with first finish with a first pair of 2 nd fini h th t rt fthe f b large heated rotating rolls to cause migration of the pigglifi z z s z z f a he a ment from the first finish to the outer surfaces of the y g 8. A method for producing decorative patterns on glass fiber fabric comprising the steps of:

a. heating the fabric to remove its protective sizing so that a heat cleaned fabric is obtained;

g. converging the dried fabrics so that they contact one another in a tiered manner; b. immersing the heat cleaned fabnc in a first finish comh. passing the dried fabrics through a second finish comprisprising a first aqueous resin bondable Pigment dispersion;

ing nd r i b d bl i t di i c. squeezing out excess first finish so that an amount of i. removing excess second finish from the fabrics so that an between (11 Percent a P r n Of the first finish is amount of from at least 0.1-50.0 percent by weight of transferred to the second finish remains thereon; d. drying the fabric with first finish in a constant temperaj. separating and subsequently contacting the outer surfaces lure heating Zone. 80 that a uniform 6010f, comprising the of the fabrics, while wet with second finish, with a second pigment from the first finish appears on both surfaces of pair of large heated rotating rolls to cause migration of the l' the pigment from the second finish to the inner surfaces e. immersing the dried fabric in a second finish comprising a of the fabrics contacting the rolls; second resin bondable pigment dispersion;

f. squeezing the fabric with second finish sufficiently to transfer an amount of between 0.! percent and 50.0 percent of the second finish thereon;

g. contacting the fabric having the dry first finish and wet second finish thereon with a rotating heated surface having a uniform discontinuous facing, wherein the temperature is sufficient to cause substantially all of the pigment from the second finish to migrate to only that part of the fabric that actually contacts the heated surface;

h. passing the fabric, with pigment from the first finish on that part of the fabric that did not contact the heated surface, and with pigment from the second finish on that part of the fabric that did actually contact the heated surface, while maintaining contact with the heated surface through a nip formed by the rotating heated surface and a large resilient roll so that permanent embossments are established in the fabric coinciding with the location of the pigment from the second finish; and

i. drying the fabric in a heating zone to permanently set the location of the pigment from the second finish,

whereby the net effect is the production of a glass fabric having a two color pattern and raised embossments thereon.

-9. A method of finishing glass fiber fabric comprising the steps of:

a. heating the fabric to remove protective sizing therefrom and to weave set the fabric;

b. applying a first finish comprising at least one aqueous resin bondable pigment dispersion to the heat cleaned and weave set fabric;

c. passing the fabric while wet with first finish through a first heating zone which causes migration of the pigment from the first finish to specific portions of the fabric;

d. drying the fabric to permanently set the location of the pigment from the first finish on the specific portions of the fabric;

e. applying a second finish comprising at least one aqueous resin bondable pigment dispersion different in color than the first finish to the dried fabric;

f. passing the fabric while wet with second finish through a second heating zone which causes migration of the pig ment from the second finish to other specific portions of the fabric; and

g. drying the fabric to permanently set the location of the pigment from the second finish on the other specific portions of the fabric,

whereby the net effect is a fabric having substantially all of the pigment of the first finish on specific portions of the fabric and substantially all of the pigment of the second finish on other specific portions of the fabric.

10. The method of claim 9, wherein the specific portions on the fabric of step (c) comprises one entire surface of the fabric.

11. The method of claim 10, wherein the other specific por tions on the fabric of step (f) comprises the other entire surface of the fabric.

12. The method of claim 9, wherein the specific portions on the fabric of step (c) comprises various uniform locations on both surfaces of the fabric.

13. The method of claim 12, wherein the other specific portions on the fabric of step (f) comprises various uniformly spaced locations on both surfaces of the fabric.

14. A method of finishing fabric composed of natural and organic fibers, comprising the steps of:

a. applying a first finish comprising at least one aqueous resin bondable pigment dispersion to the fabric; passing the fabric while wet with first finish through a first heating zone which causes migration of the pigment from the first finish to specific portions of the fabric;

. drying the fabric to permanently set the location of the pigment from the first finish on the specific portions of the fabric;

applying a second finish comprising at least one aqueous resin bondable pigment dispersion different in color than the first finish to the dried fabric e. passing the fabric while wet with second finish through a second heating zone which causes migration of the pigment from the second finish to other specific portions of the fabric; and drying the fabric to permanently set the location of the pigment from the second finish on the other specific portions of the fabric, whereby the net effect is a fabric having substantially all of the pigment of the first finish on specific portions of the fabric and substantially all of the pigment of the second finish on other specific portions of the fabric.

15. The method of claim 14, wherein the specific portions on the fabric of step (b) comprises one entire surface of the fabric.

16. The method of claim 15, wherein the other specific portions on the fabric of step (e) comprises the other entire surface of the fabric.

17. The method of claim 14, wherein the specific portions on the fabric of step (b) comprises various uniform locations on both surfaces of the fabric.

18. The method of claim 17, wherein the other specific portions on the fabric of step (e) comprises various uniformly spaced locations on both surfaces of the fabric. 

2. The method as claimed in claim 1 wherein the fabric''s one surface is heated more than the other in said first heating zone of step (d) so that a first temperature differential of from at least 10* to 250* F. exists from the one surface to the other, causing the first pigment to migrate to said one surface and wherein the fabric''s other surface is heated more than the said one surface in said second heating zone of step (h) so that a second temperature differential of from at least 10* to 250* F. exists from said other surface to said one surface, causing the second pigment to migrate to said other surface.
 3. A method for producing decorative color reversible glass fiber fabrics, comprising the steps of: a. advancing two heat-cleaned glass fiber fabrics in contact one with the other through a first finish comprising a first aqueous resin bondable pigment dispersion; b. removing excess first finish from the fabrics to deposit from about 0.1 percent to 50.0 percent of the first finish thereon; c. drying the fabrics and first finish while in contact so that a first temperature differential of from at least 10* to 250* F. exists between the inner and outer surfaces of said fabrics sufficient to cause the pigment from the first finish to migrate and lodge on the outer surfaces of the fabrics; d. reversing the fabric surfaces so that the former inner and outer surfaces become the present outer and inner surfaces respectively; e. advancing the dried fabrics while in contact through a second finish comprising a second aqueous resin bondable pigment dispersion; f. removing excess second finish from the fabrics to deposit from about 0.1 percent to 50.0 percent of the second finish thereon; and g. drying the fabrics and second finish while in contact so that a second temperature differential of from at least 10* to 250* F. exists between the present inner and outer surfaces of said fabrics sufficient to cause the pigment from the second finish to migrate and lodge on the present outer surfaces of the fabrics, whereby substantially all of the pigment from the first finish is on one side of each fabric and substantially all of the pigment from the second finish is on the other side thereof.
 4. A method for producing a decorative color reversible glass fabric comprising the steps of: a. advancing heat-cleaned and weave set fabric through a first finish comprising a first aqueous resin bondable pigment dispersion; b. removing excess first finish from the fabric so that an amount of from 0.1 percent to 50.0 percent of said finish is transferred to the fabric; c. contacting one surface of the fabric with first finish while wet with a first rotating heated surface, for a sufficient time to cause migration of the pigment from the first finish to the surface not in contact with the first heated surface; d. drying the fabric having the pigment from the first finish on substantially only one surface thereof to permanently establish its location; e. advancing the dried fabric through a second finish comprising a second aqueous resin bondable pigment dispersion; f. removing excess second finish from the fabric so that an amount of from 0.1 percent to 50.0 percent of said second finish is transferred to the fabric; g. contacting the other surface of the fabric while wet with second finish, with a second rotating heated surface for a sufficient time to cause migration of the pigment from the second finish to the surface not in contact with the second heated surface; and h. drying the fabric having the pigment from the second finish on substantially only one surface thereof to permanently establish its location, whereby the net effect of said method is a fabric comprising substantially all of the pigment from the fiRst finish on one side and substantially all of the pigment from the second finish on the other side thereof.
 5. A method for producing decorative glass fiber fabrics, comprising the steps of: a. advancing two greige glass fabrics into a heat-treating zone to remove protective sizing therefrom; b. converging the heat treated fabrics so that they contact one another in a tiered manner; c. passing the heat-treated fabrics while in contact with one another through a first finish comprising a first resin bondable pigment dispersion; d. removing excess first finish from the fabrics so that an amount of from at least 0.1-50.0 percent by weight of first finish remains thereon; e. separating and subsequently contacting the inner surfaces of the fabrics, while wet with first finish with a first pair of large heated rotating rolls to cause migration of the pigment from the first finish to the outer surfaces of the fabrics contacting the rolls; f. drying the fabrics to permanently establish the position of the pigment from the first finish thereon; g. converging the dried fabrics so that they contact one another in a tiered manner; h. passing the dried fabrics through a second finish comprising a second resin bondable pigment dispersion; i. removing excess second finish from the fabrics so that an amount of from at least 0.1-50.0 percent by weight of second finish remains thereon; j. separating and subsequently contacting the outer surfaces of the fabrics, while wet with second finish, with a second pair of large heated rotating rolls to cause migration of the pigment from the second finish to the inner surfaces of the fabrics contacting the rolls; k. drying the fabrics to permanently establish the position of the pigment from the second finish; and l. collecting the fabrics, wherein the net effect is the production of two fabrics having substantially all of the pigment from the first finish on one surface and substantially all of the pigment from the second finish on the other surface.
 6. A method for producing decorative patterns on glass fiber fabric, comprising the steps of: a. heating the fabric to remove its protective sizing so that a heat-cleaned fabric is obtained; b. advancing the heat-cleaned fabric through a finish comprising at least one aqueous resin bondable pigment dispersion; c. removing excess finish so that a transfer to the fabric of between about 0.1 percent to 50.0 percent of the finish is obtained; d. contacting the fabric while wet with the finish, with a rotating heated surface having a disruptive facing, so that a uniform pattern appears on the fabric by the migration and disposition of a greater amount of the pigment on that part of the fabric that actually contacts the heated surface; and e. drying the finished fabric in a heating zone, to permanently set the pattern on the fabric, whereby the pattern on the glass fiber fabric uniformly appears on both surfaces of the fabric.
 7. A method for producing decorative patterns on glass fiber fabric comprising the steps of: a. heating the fabric to remove its protective sizing so that a heat cleaned fabric is obtained; b. passing the heat cleaned fabric through a first finish comprising a first aqueous resin bondable pigment dispersion; c. squeezing out excess first finish so that an amount of between 0.1 percent and 50.0 percent of the first finish is transferred to the fabric; d. drying the fabric with first finish through a constant temperature heating zone, so that a uniform color appears on both surfaces of the fabric; e. passing the dried fabric through a second finish comprising a second aqueous resin bondable pigment dispersion; f. squeezing the fabric with second finish sufficiently to transfer an amount of between 0.1 percent and 50.0 percent of the second finish thereon; g. contacting the fabric having the dry firsT finish and wet second finish thereon with a rotating heated surface having a uniform discontinuous facing, wherein the temperature is sufficient to cause substantially all of the pigment from the second finish to migrate to only that part of the fabric that actually contacts the heated surface; and h. drying the fabric in a heating zone to permanently set the location of the pigment from the second finish, whereby the total effect on both surfaces of the glass fiber fabric appears as a uniform, highly contrasting pattern comprising the pigment from the first finish and the pigment from the second finish on that part of the fabric that actually contacted the rotating heated surface.
 8. A method for producing decorative patterns on glass fiber fabric comprising the steps of: a. heating the fabric to remove its protective sizing so that a heat cleaned fabric is obtained; b. immersing the heat cleaned fabric in a first finish comprising a first aqueous resin bondable pigment dispersion; c. squeezing out excess first finish so that an amount of between 0.1 percent and 50.0 percent of the first finish is transferred to the fabric; d. drying the fabric with first finish in a constant temperature heating zone, so that a uniform color, comprising the pigment from the first finish appears on both surfaces of the fabric; e. immersing the dried fabric in a second finish comprising a second resin bondable pigment dispersion; f. squeezing the fabric with second finish sufficiently to transfer an amount of between 0.1 percent and 50.0 percent of the second finish thereon; g. contacting the fabric having the dry first finish and wet second finish thereon with a rotating heated surface having a uniform discontinuous facing, wherein the temperature is sufficient to cause substantially all of the pigment from the second finish to migrate to only that part of the fabric that actually contacts the heated surface; h. passing the fabric, with pigment from the first finish on that part of the fabric that did not contact the heated surface, and with pigment from the second finish on that part of the fabric that did actually contact the heated surface, while maintaining contact with the heated surface through a nip formed by the rotating heated surface and a large resilient roll so that permanent embossments are established in the fabric coinciding with the location of the pigment from the second finish; and i. drying the fabric in a heating zone to permanently set the location of the pigment from the second finish, whereby the net effect is the production of a glass fabric having a two color pattern and raised embossments thereon.
 9. A method of finishing glass fiber fabric comprising the steps of: a. heating the fabric to remove protective sizing therefrom and to weave set the fabric; b. applying a first finish comprising at least one aqueous resin bondable pigment dispersion to the heat cleaned and weave set fabric; c. passing the fabric while wet with first finish through a first heating zone which causes migration of the pigment from the first finish to specific portions of the fabric; d. drying the fabric to permanently set the location of the pigment from the first finish on the specific portions of the fabric; e. applying a second finish comprising at least one aqueous resin bondable pigment dispersion different in color than the first finish to the dried fabric; f. passing the fabric while wet with second finish through a second heating zone which causes migration of the pigment from the second finish to other specific portions of the fabric; and g. drying the fabric to permanently set the location of the pigment from the second finish on the other specific portions of the fabric, whereby the net effect is a fabric having substantially all of the pigment of the first finish on specific portions of the fabric and substantially all of the pigment of the second finIsh on other specific portions of the fabric.
 10. The method of claim 9, wherein the specific portions on the fabric of step (c) comprises one entire surface of the fabric.
 11. The method of claim 10, wherein the other specific portions on the fabric of step (f) comprises the other entire surface of the fabric.
 12. The method of claim 9, wherein the specific portions on the fabric of step (c) comprises various uniform locations on both surfaces of the fabric.
 13. The method of claim 12, wherein the other specific portions on the fabric of step (f) comprises various uniformly spaced locations on both surfaces of the fabric.
 14. A method of finishing fabric composed of natural and organic fibers, comprising the steps of: a. applying a first finish comprising at least one aqueous resin bondable pigment dispersion to the fabric; b. passing the fabric while wet with first finish through a first heating zone which causes migration of the pigment from the first finish to specific portions of the fabric; c. drying the fabric to permanently set the location of the pigment from the first finish on the specific portions of the fabric; d. applying a second finish comprising at least one aqueous resin bondable pigment dispersion different in color than the first finish to the dried fabric; e. passing the fabric while wet with second finish through a second heating zone which causes migration of the pigment from the second finish to other specific portions of the fabric; and f. drying the fabric to permanently set the location of the pigment from the second finish on the other specific portions of the fabric, whereby the net effect is a fabric having substantially all of the pigment of the first finish on specific portions of the fabric and substantially all of the pigment of the second finish on other specific portions of the fabric.
 15. The method of claim 14, wherein the specific portions on the fabric of step (b) comprises one entire surface of the fabric.
 16. The method of claim 15, wherein the other specific portions on the fabric of step (e) comprises the other entire surface of the fabric.
 17. The method of claim 14, wherein the specific portions on the fabric of step (b) comprises various uniform locations on both surfaces of the fabric.
 18. The method of claim 17, wherein the other specific portions on the fabric of step (e) comprises various uniformly spaced locations on both surfaces of the fabric. 